1 Aker Engineering Malaysia Sdn Bhd
2 MMC Oil & Gas Engineering Sdn Bhd
3 Ranhill Worley
4 T.EN Consultant (M) Sdn. Bhd. (formerly known as Technip Consultant (M) Sdn. Bhd.)
5 Blackstone E&C Sdn Bhd
6 Cekap Technical Services Sdn Bhd
7 Environmental Resources Management (M) Sdn Bhd
8 Enserv Sdn Bhd
9 Emerson Process Management (M) Sdn Bhd
10 Innovative Fluid Process Sdn Bhd
11 MECIP Global Engineers Sdn Bhd
12 Minconsult Sdn Bhd
13 Malaysia Marine & Heavy Engineering Sdn Bhd
14 Peritus International Sdn Bhd
15 RNZ Integrated (M) Sdn Bhd
16 Synergy Oil & Gas Engineering Sdn Bhd
17 Toyo Engineering & Construction Sdn Bhd
18 WEG South East Asia Sdn Bhd (Formerly known as Watt Euro-Drive (M) Sdn Bhd)
19 Water Engineering Technology Sdn Bhd
20 Fluor Daniel International (M) Sdn Bhd
21 ICE WOOD Sdn. Bhd. (Formerly known as Wood Group Engineering Sdn Bhd)  
22 IGL Services Sdn Bhd
23 Tanjung Offshore Services Sdn Bhd
24 Elektro Serve (M) Sdn Bhd
25 Maju Integrated Engineers Sdn Bhd
26 Tenbex Engineering Sdn Bhd